when getClipBounds returns false, the out-param is uninitialized

gm/imageblurtiled.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkBlurImageFilter.h"
 #include "SkRandom.h"
@@ skipping 16 matching lines @@
 
     virtual SkISize onISize() {
         return make_isize(WIDTH, HEIGHT);
     }
 
     virtual void onDraw(SkCanvas* canvas) {
         SkPaint paint;
         paint.setImageFilter(SkBlurImageFilter::Create(fSigmaX, fSigmaY))->unref();
         const SkScalar tile_size = SkIntToScalar(128);
         SkRect bounds;
-        canvas->getClipBounds(&bounds);
+        if (!canvas->getClipBounds(&bounds)) {
+            bounds.setEmpty();
+        }
         for (SkScalar y = bounds.top(); y < bounds.bottom(); y += tile_size) {
             for (SkScalar x = bounds.left(); x < bounds.right(); x += tile_size) {
                 canvas->save();
                 canvas->clipRect(SkRect::MakeXYWH(x, y, tile_size, tile_size));
                 canvas->saveLayer(NULL, &paint);
                 const char* str[] = {
                     "The quick",
                     "brown fox",
                     "jumped over",
                     "the lazy dog.",
@@ skipping 19 matching lines @@
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static GM* MyFactory1(void*) { return new ImageBlurTiledGM(3.0f, 3.0f); }
 static GMRegistry reg1(MyFactory1);
 
 }